Projects becoming corrupt very frequently

I have had this issue in the past, and had to entirely re-create a course in Storyline after the file mysteriously became corrupted. After that I have been rigorously backing up my .story files, but this has happened three more times since it happened the first time.

I'm starting to feel like there could be a bug or something wrong with my Storyline installation. It's incredibly frustrating to not know if my files will be intact tomorrow or the next day. I have clients that expect finished courses this month, and setbacks like this are becoming really tiring. Does anyone have any advice?

I have tried the following:

-I am working from a local hard drive, not a USB or network drive.

-I have followed the steps outlined in this thread: https://community.articulate.com/discussions/articulate-storyline/storyline-file-corrupt-and-will-not-open